Explain yield and yield from more

[wwwillchen]

https://google.github.io/mesop/guides/interactivity/

From chat:

yeah, this part is a bit confusing unless you're familiar with Python generators.

Essentially an event handler function e.g. on_click can be a regular function or a generator function (i.e. uses yield)

Sometimes, you may want to share logic between multiple event handler functions, so you'll extract it into a method like:

def submit()
   s = me.state(State)
   s.is_loading = True
   yield
   s.content = call_llm()
   s.is_loading=False
   yield

because submit itself is a generator function, you can't just call it like a normal python function (e.g. submit()), instead you need to do yield from submit() this way the yields in submit run as expected

[pranshu-raj-211]

I'd love to work on this and I'm familiar with generators.
Could you please describe what exactly you want to have in the docs, for example you mentioned multiple callback functions using the same code essentially, should there be examples of wrapper functions too.

[wwwillchen]

Hi @pranshu-raj-211 - thanks for volunteering. I think showing examples of having multiple callback functions reuse the same code would be great.

Could you clarify what you mean by wrapper functions? Please feel free to send a PR to update our docs:

mesop/docs/guides/interactivity.md

Line 4 in 9340aca

and I'd be happy to review - thanks!

[wwwillchen]

Updated docs